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Chung, Moses
Intense Beam and Accelerator Laboratory (IBAL)
Research Interests
  • Accelerator, beam physics and diagnostics, plasma

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Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients

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Title
Simulation and experimental study of proton bunch self-modulation in plasma with linear density gradients
Author
Guzman, P. I. MoralesMuggli, P.Agnello, R.Ahdida, C. C.Aladi, M.Goncalves, M. C. AmoedoAndrebe, Y.Apsimon, O.Apsimon, R.Bachmann, A-MBaistrukov, M. A.Batsch, F.Bergamaschi, M.Blanchard, P.Braunmuller, F.Burrows, P. N.Buttenschon, B.Caldwell, A.Chappell, J.Chevallay, E.Chung, M.Cooke, D. A.Damerau, H.Davut, C.Demeter, G.Dexter, A.Doebert, S.Farmer, J.Fasoli, A.Fedosseev, V. N.Fiorito, R.Fonseca, R. A.Furno, IGessner, S.Gorn, A. A.Granados, E.Granetzny, M.Graubner, T.Grulke, O.Gschwendtner, E.Guran, E. D.Hafych, VHenderson, J. R.Huether, M.Kedves, M. A.Khudyakov, VKim, S-YKraus, F.Krupa, M.Lefevre, T.Liang, L.Lopes, N.Lotov, K., VMartyanov, M.Mazzoni, S.Godoy, D. MedinaMoody, J. T.Moon, K.Moreira, M.Nechaeva, T.Nowak, E.Pakuza, C.Panuganti, H.Pardons, A.Perera, A.Pucek, J.Pukhov, A.Raczkevi, B.Ramjiawan, R. L.Rey, S.Schmitz, O.Senes, E.Silva, L. O.Stollberg, C.Sublet, A.Topaloudis, A.Torrado, N.Tuev, P., VTurner, M.Velotti, F.Verra, L.Vieira, J.Vincke, H.Welsch, C. P.Wendt, M.Wing, M.Wolfenden, J.Woolley, B.Xia, G.Zepp, M.Della Porta, G. Zevi
Issue Date
2021-10
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW ACCELERATORS AND BEAMS, v.24, no.10, pp.101301
Abstract
We present numerical simulations and experimental results of the self-modulation of a long proton bunch in a plasma with linear density gradients along the beam path. Simulation results agree with the experimental results reported [F. Braunmller, T. Nechaeva et al. (AWAKE Collaboration), Phys. Rev. Lett. 125, 264801 (2020)]: with negative gradients, the charge of the modulated bunch is lower than with positive gradients. In addition, the bunch modulation frequency varies with gradient. Simulation results show that dephasing of the wakefields with respect to the relativistic protons along the plasma is the main cause for the loss of charge. The study of the modulation frequency reveals details about the evolution of the self-modulation process along the plasma. In particular for negative gradients, the modulation frequency across time-resolved images of the bunch indicates the position along the plasma where protons leave the wakefields. Simulations and experimental results are in excellent agreement.
URI
https://scholarworks.unist.ac.kr/handle/201301/54810
URL
https://journals.aps.org/prab/abstract/10.1103/PhysRevAccelBeams.24.101301
DOI
10.1103/PhysRevAccelBeams.24.101301
ISSN
2469-9888
Appears in Collections:
PHY_Journal Papers
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